EJ20 in a buggy...turbo upgrade? - Subaru WRX Forum
 
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#1 Old 12-31-2008, 09:55 PM
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EJ20 in a buggy...turbo upgrade?

First off, I am new to the forum and have done quite a bit of reading thru the threads. Lots of great info here.

I currently run a JDM EJ20 Turbo. Looks to have been from a Legacy. It is in a dune buggy with all of the smog and stuff removed and running an EMS stinger ECU. It has a VF11 turbo and I might of damaged it when I spun a bearing. If I need to replace it, would a VF22 or 34 be a good choice? It sees mostly high RPM use while duning. I want to make plenty of HP but dont want a big turbo lag either. Outfront Motorsports who deals with these motors advertise them at 220hp. Looking for more HP with a heavy car...

I know my question might seem a little simple, but since my EJ20 is set up a little different and has a totally different use than a street car, I just want to make the right decision. Any help would be greatly appreciated.


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#2 Old 12-31-2008, 11:14 PM
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VF22 would be low-end midrange punch and the VF34 would be mid-high. Either one would be great and just get it ported you'll be happy. BTW that buggy looks sick. I've seen an STI ATV but not a buggy, it looks awesome though...good luck.
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#3 Old 01-01-2009, 12:44 AM
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I would look elsewhere than IHI for your turbo. Consider a Mitsubishi TD05-16G. They come in a variety of layouts too, looks like you might have a non-stock configuration there

Mitsu turbos are more efficient and deliver good numbers with minimal lag. They're cheap too.

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#4 Old 01-01-2009, 11:13 AM
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Outfront has TD04's laying around by the dozens. Does the TD05 come with the same weird exhaust flange? What would the TD05 compare to in the IHI line?

Most of the Subaru powered rails are the higher end cars $40K + to start! Most of the guys buy them built, while I did mine myself. So there isnt a whole lot of info out there on them in this type of application. THe guys on some of the other webistes just dont know what to do since it doesnt have a CAI or cat back exhaust! lol!
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#5 Old 01-01-2009, 11:25 AM
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I think by weird exhaust flange you men mean the internal wastegate? Yes, it would have that.

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#6 Old 01-01-2009, 11:29 AM
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Actually, I was thinking of the triangle exhaust flange on the bottom of the turbo. I dont want to have change headers.
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#7 Old 01-01-2009, 11:34 AM
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Ah. See, that's just normal to us.

Here's a TD05-16G picture:


They come in other layouts though. Not sure exactly what layout you've got there. Doesn't look Subaru stock.

EDIT: Actually the 16G may be a little small if you stay >5000rpms most of the time. The same housing with a bigger compressor would flow more all the way to redline. Something like a TD05-18G...

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#8 Old 01-01-2009, 11:37 AM
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That would fit! Yes, mine has the stock configuration, it just has the bolt on 90 degree intake for a legacy installation. But obviously in my configuration, I could make the one you posted work!
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#9 Old 01-01-2009, 11:44 AM
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How do you have the thing tuned? I mean, throwing a bigger turbo on there won't help you much if the ECU isn't adding more fuel. Also, bigger injectors and fuel pumps are mods we do to keep up with a larger turbo, not sure if you'd be in that situation too...

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#10 Old 01-01-2009, 11:47 AM
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I already have a EMS stinger ECU and a Walbro 255 pump. I can take it to Outfront and they will tune it on a dyno. Currently its probably close to a stock tune with 220hp at the crank.
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#11 Old 01-01-2009, 12:14 PM
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Sounds good. I'm going to wager you'll need bigger injectors though, especially with an 18G

220 at the Crank from a VF11, you might hit 350 with the 18G...

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#12 Old 01-01-2009, 10:21 PM
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sorry to chang the subject but i'm trying to figure out how you can have the engine and tranny backward and make the buggy go forward?

O2 PEARL BLACK WAGON with some modds
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#13 Old 01-01-2009, 10:24 PM
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Volkswagen 002 Bus tranny...not a Suby tranny.
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#14 Old 01-02-2009, 07:45 AM
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that actualy bolts up? and i'm geussing you had to build it to make it strong enough.

O2 PEARL BLACK WAGON with some modds
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#15 Old 01-02-2009, 10:14 AM
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Kennedy and Hecker both make adapters and flywheels. Very simple install. The Bus tranny will hold up to it for a while and then needs some special upgrades. But its a popular tranny and you can get them built off the shelf...dozens and dozens of gear ratios too!
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